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CVE-2026-21587PATCHED
atlassian · jira service management data center

CVE-2026-21587: This High severity Improper Authorization vulnerability was introduced in version 11.3.0 of Jira Service Management Data

Description

This High severity Improper Authorization vulnerability was introduced in version 11.3.0 of Jira Service Management Data Center. This Improper Authorization vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to gain unintended access and can lead to the exposure of resources or functionality, possibly providing attackers with sensitive information or even execute arbitrary code. Atlassian recommends that Jira Service Management Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: * Jira Service Management Data Center 11.3: Upgrade to a release greater than or equal to 11.3.11 See the release notes (https://confluence.atlassian.com/servicemanagement/jira-service-management-release-notes-780083086.html). You can download the latest version of Jira Service Management Data Center from the download center (https://www.atlassian.com/software/jira/service-management/download-archives). This vulnerability was reported via our Penetration Testing program.

Affected Products

VendorProductVersions
atlassianjira service management data center11.3.0 to 11.3.10

References

  • https://confluence.atlassian.com/pages/viewpage.action?pageId=1822852209
  • https://jira.atlassian.com/browse/JSDSERVER-16747

Related News (1 articles)

Tier C
VulDB12d ago
CVE-2026-21587 | Atlassian Jira Service Management Data Center up to 11.3.10 improper authorization
→ No new info (linked only)

Discussion (0)

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CISA KEV❌ No
Actively exploited❌ No
Patch available
11.3.11
PublishedSep 15, 2026
Last enriched12d ago
Trending Score5
Source articles1
Independent1
Info Completeness0/14
Missing: cve_id, title, description, vendor, product, versions, cvss, epss, cwe, kev, exploit, patch, iocs, mitre_attack

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Related CVEs (5)

NONECVE-2026-21582
CVE-2026-21582: This High severity BASM (Broken Authentication & Session Management) vulnerability known as CVE-2026-21582 was introduce
Trending: 9
NONECVE-2026-21586
CVE-2026-21586: This High severity Improper Authorization vulnerability was introduced in versions 7.4.0, 7.13.0, 8.5.0, 8.9.0, 9.0.1, 9
Trending: 5
NONECVE-2026-21588
CVE-2026-21588: This High severity DoS (Denial of Service) vulnerability was introduced in versions 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9
Trending: 4
NONECVE-2026-21580
CVE-2026-21580: This Critical severity Stored XSS, PrivEsc (Privilege Escalation), and Security Misconfiguration vulnerability was intro
Trending: 1
NONECVE-2026-21577
CVE-2026-21577: This High severity DoS (Denial of Service) vulnerability was introduced in versions 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9

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Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
Sep 15, 2026
Discovered by ZDM
Sep 15, 2026
Patch Available
Sep 17, 2026